This is an archive of the "Mathematics (Percents and Decimals)" educational program published by Dorsett Educational Systems, Inc. in 1983. This was originally packaged as a set of 8 cassette tapes for use with Atari 400 and 800 computers and the Educational System Master Cartridge.
The "raw recordings" directory contains the unaltered recordings from cassette, one file per tape, with both sides of each tape in the same file. You probably don't want to use this folder.
The main files (mp1 through mp16) are likely the versions you want to use with your Atari or emulator. These have been split into 16 files (one per tape side). The audio levels have had their volume normalized, as well as any pops and clicks removed, and subsequently repaired on the data tracks. Each tape has been verified to work on the Altirra emulator.
Finally, photos of the cassette tapes are included.
Album: Mathematics (Percentages and Decimals)
Year: 1980
Original Format: Atari Educational System (Dorsett Talk & Teach)
Digital Format: Microsoft WAV, 2 channel, 16-bit 44100Hz sample rate
Tracks:
mp1Decimals and Fractional Equivalents
mp2Place Values of Decimal Point
mp3Additions & Subtraction of Decimals
mp4Multiplication of Decimals
mp5Changing Fractions to Decimals
mp6Rounding Decimals, Dollrs, and Cents
mp7Changing Percent to Decimal Fractions
mp8Part percent, total in percent
mp9Solving for a Missing Percent Value
mp10Reciprocals in Simple Equations
mp11Percent of one Number to Another
mp12Interest on Money, Part 1, The Principal
mp13Part 2, Interest FOrmula, Installment
mp14Part 3, discounted installment--interest
mp15Part 4, Comparing Interest
mp16Part 5, Simple Interest on Savings
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